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w. SCHENCK.

DRAWING PEN.

APPLICATION FILED MAY 20' I918.

1,304,709. Patented May 27, 1919.

WILKENS A. SCHENCK, OF PHILADELPHIA, PENNSYLVANIA.

DRAWING-PEN.

Specification of Letters Patent.

Patented May 27, 1919.

Application filed May 20, 1918. Serial No. 235,521.

To all whom it may concern: 7

Be it known that I, WILKENS A. SonnNoK,

a citizen of the United States, residing at t 44 N. 4th street,Philadelphia, in the county of Philadelphia and State of Pennsylvania,

' have invented new and useful Improvements in Drawing-Pens, of whichthe following is a specification.

The invention relates to pens and more particularly to drafting pens foruse by draftsmen and the like, and has for an object to provide a rulingpen of the class mentioned which can be cheaply and easily manufactured;in which the nibs can be. moved apart for cleaning purposes wlthoutdisturbing the manner in which they are relatively set when they areclosed; in whlch one of the legs has a greater resiliency andspring-like action than the other, and in which the point of springaction is removed from the point of connection of the pen proper withthe handle, to prevent wear at that point. 1 0

Among other features, the invention comprehends a rulin pen in which thebody of the pen can be ormed of a slngle plece of material, namely, ablank, the latter when formed into the finished product provlding ashank and relatively arranged legs terminating in nibs, which areconnected by a screw, and therefore relatively ad1usted at the nib ends,and a handle having connection with the pen proper at the shank, theshank being so formed and designed that the spring action that isnecessary w1ll be entirely on the part of one of the legs, and saidspring action will be removed from the point of connection of the handlew th the pen body, so as to prevent any wearing out of the usual threademployed in connecting the handle to the pen proper.

In the further disclosure of the invention, reference is to be had tothe accompanying drawing, constituting a part of this specification, inwhich sim1lar characters of reference denote corresponding parts in allthe views, and in which Figure 1 1s a side elevation of the pen. Fig. 2is a similar view showing the spring le in open or normal position.

ig. 3 is a front elevation. Fig. 4 is a sectional enlarged view taken onthe line 4-4 of Fig. 1.

Fig. 5 is a fragmentary side elevation of a modified form, and

Fig. 6 is a plan view of the blank from which the pen is formed.

Referring more particularly to the views the blank, indicated by thenumeral 10, consists of any good form of steel and, as shown, provides ashank ll at; the medial portion,

said shank being enlarged relative to therest of the blank, with legsformed by the parts of the blank extending from the shank,

said legs being indicated by numerals 12 and 13. The blank is of coursebent upon itself at the shank 11, and thus the legs 12 and 13 willbearranged, as shown in Figs. 1 m4. inclusive. The shank 11 is providedwith an aperture 1 1 through which extends a threaded stud 15 of ahandle 16, thus holdingthe pen body and handle together. A suitableadjusting screw 17 passes loosely through an opening 18 in the leg 13,and is threaded through an opening 19 in the leg 12, thus permitting ofthe relative adjustment of the nibs of the legs, indicated by numerals20, 21, whereby the nibs can be spaced apart a sufiicient distance forcleaning, and when drawn together again, by tightening up the screw 17,the set of the pen will not have been disturbed.

Particular attention is called to the construction of the shank 11, andwhich it will be noted is so formed that one side of the shank, namely,the side from which the leg 13 extends, is reduced in thickness at apoint 22 relative to the other shank from which the leg 12 extends, andwhich it will be seen is substantially thicker than the part of theshank at 22. By having this form of construction, the spring-like actionor resiliency that is necessary in a ruling pen, is all in the leg 13and that part of the shank from which the leg 13 extends, so that thespring action will be centered substantially at the point 22 and, asshown in Fig. 2, when the screw 17 is removed or loosened, the leg 13will move away from the le 12, the latter remaining substantiallystatlonary relative to the handle 16. With this arrangement a greaterspring-like action and resiliency is obtained, and one that isabsolutely ositive in preventing any disturbance o the setting of thepen, for the reason that the movable leg will naturally move toward thestationary leg when the screw is tightened to bring the nibs 20, 21 intotheir proper relation. Further, by having the point of spring action at22, rather than at the point of connection of the handle with the penbody, the wearing out of the stud 15 will be prevented, and the removalof the strain from this point results in a more durable ruling pen,having greater strength and more lasting qualities. It will be notedthat the side of the shank from which the leg 12 extends has asubstantially curved face 23; whereas, the side of the shank from whichthe leg 13 extends, has its face 24: flat but inclined relative to thehandle 16 or to the vertical axis of the pen, and it is by the reductionin thickness of this side of the shank that I accomplish my result,namely, the provision of a pen in which the upper leg will be the movingelement and'have the spring-like action that is necessary to a rulingpen.

In Fig. 5 I show a slightly modified form of my invention and in whichboth sides or faces 23, 2% of the shank 11 are reduced in thickness atthe points 2%, 22 and thus each leg will have the same resiliencywithout having the strain of the spring-like action centered at thepoint of connection of the handle 16 with the pen body, but of course itwill be understood that I prefer the construction shown in Figs. 1 to 4:inelusive.

Aside from the spring-like quality secured by a pen of this character, Iwill be enabled, by having the pen body made from a blank, tomanufacture the pen at a far lower cost than ruling pens are nowmanufactured, and which are made in two pieces brazed together, or insome other such form.

By reference to Fig. at it will be seen that the reduction in thicknessof the shank at the point 22 is considerable when compared with thethickness of the shank on the opposite side thereof.

I claim:

As a new article of manufacture, a ruling pen comprising a handle and asingle piece of elongated metal bent at its medial portion to formblades terminating in nibs, the

medial bent portion'being perforated to re- 7 ceive a stud whereby thepen is secured to the handle, and said piece of elongated metal beingreduced in thickness adjacent the medial bent portion to give therequisite spring to one of the blades or a plurality thereof.

In testimony whereof I- afliX my signature.

WILKENS A. SCHENCK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patentui Washington, D. C.

